Possible Causes
| Possible Causes |
|---|
| ENGINE BRAKE DTCS PRESENT |
| ABS DTCS PRESENT |
| (L51) BRAKE SWITCH SIGNAL OPEN |
| (L51) BRAKE SWITCH SIGNAL SHORTED TO VOLTAGE |
| SHIFT LEVER ASSEMBLY |
Always perform the NAG1 Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to STANDARD PROCEDURE .